Paul99EX

I know civics call for 5w-30, but does it really matter what type you use? i been using valvoline 10w-30 for sometime now, but i was thinking maybe today to start running the 5w-30 again since it calls for it. dont know what anyone else does.

Ravage70

for winter use 5w30 synthetic

Bone1

5w30 all the time.............

Ravage70

i woudnt run 5w30 on high mileage engines or boosted ones

personally i like very thick oils for summer time

rudebwoy

15w50 in my boosted civic. I tried everything so far, and it seems I burn them up up fast, so 15w50 is the only oil that last to 500 miles, then again I drove my car daily autobahn driving at average speeds of 120mph. 40 miles daily

Tatakai

you use synthetic in the winter? synthetic is hard on the engine during start up, and it takes longer to warm up since its cold as ***** out.

then again, its probably all good if you let your motor completely warm up before you drive it, eh?

Paul99EX

well i have around 108K on my car, and i drive pretty hard, over 100mph alot, but im still n/a, but use the n2o sometimes, hahaha, you think 5w30 syntec blend or just 5w30 regular like castrol gtx or penzoil?

robs99si

I'm using regular castrol 20w-50w with 70k miles boosted 99' si. the thicker the oil, the better it holds upto heat and wear.

nonvtec

Since boosted, 20-50 winter, 10-30 summer

mahcivic

i use 15w50 mobil 1 all the time